Device for pulling over uppers on lasts



Patented Jan. 2, 1923.

MARIUS METHILT'US SORENSEN,

OF VALLEROD, NEAR RUNGSTED, ISLE OF SEALAND,

DENMARK.

DEVICE FOR PULLING OVER UPPERS ON LASTS.

Application filed August as To all whom it may c0nccm-:

Be it known that MAnIUs Mnrmnrns So- RENSEN, a subject of the King ofDenmark, residing at Vallerod, near llungsted, Isle of Sealand, in theKingdom of Denmark, has invented certain new and useful linprovements inDevices for Pulling Over Uppers on Lasts, of which the following is aspecification. I

This invention relates to a method of pulling over shoe uppers on thelast, especially uppers which are to be lasted according to the methodcovered by U. S. Patent No. 1224229.

The object of the invention is to hold the upper fast in the stretchedposition without the use of nails, which would complicate the ensuinglasting according'to the aforesaid method, and which requires thedisposal of a special nail feeding mechanism and naildriving mechanismin connection with the pulling over mechanism.

With the present method after the upper is pulled over the last throughthe move ment of the pulling grippers, a pressure on the upper, directedagainst the top side of the last, is exercised and maintained, so thatthere occurs a sufiiciently strong friction between the last and theupper to hold the latter in the pulled over position.

The invention is illustrated in the accompanyin r drawing, in which Fig.1 diagram matical ly shows the aforesaid principle, and Fig. 2 shows adevice intended to exercise and maintain the aforesaid pressure.

For the sake of simplicity the edge of the upper is shown by means of adouble line, in such a manner that one line indicates the threads 5 and6 respectively, which serves for lasting the front 3 and the back 4,respectively. 7 designates the last, and 8 represents the grippers ofthe pulling over mechanism. I

When the upper, in the well-known way, has been grasped by the grippersand 1S pulled down over the last through the move ments of thesegrippers, the aforesaid friction between the last and the upper iseffected by pressure, as indicated by the arrows 9 and 10 in Fig. 1, andas this pres sure is maintained, independent of the pul 1920. Serial No.105,711.

ing over machine, the last, with the upper pulled over it, can beremoved from this machine, and can be manipulated just like theintermediate product that comes from the ordinary pulling over machineswhich operate with nails.

The device, independent of the pulling over machine, for producing andmaintaining the aforesaid friction between the last and the upperconsists, in the example shown in Fig. 2, of a strap 11, which is passedover the upper, and which can be maintained in stretched condition bymeans of a spring 12. This spring is of the traction spiral type and isdisposed on a rod 13, with whose head 1% one of its ends is connected,while its other endis connected with a sleeve 15 shiftable on the rod.Close to the other end of the rod there is a holdingmember 16, which,when the spring is pulled by the sleeve 15 approaching this end, can

grip into an undercut recess 17 in the sleeve,

and thus keep the spring in tension. At this end of the rod 13 there isa pressureplate 18, which can press against the bottom of the last 7,and on the sleeve 15 there are hooks 19 on which the ends of the strap11 can be hooked in an easily releasable manner. When the holding-member16 is released from the recess 1(, the sprin 1-. as it contracts, willpull the strap 11 tight o ver theupper, thus producing the desiredfriction-connection between last and upper.

It is obvious that the invention is not confined to the specific holdingmeans shown in Fig. 2 and it is self-evident thatthe details of thedevice may be modified and changed within the scope of the followingclaims.

What I claim and desire to secure by Letters Patent is 1. A device forproducing and maintain ing friction between a last and'an upper that ispulled over the last, consisting of a member for exercising pressureagainst the upper, a pressure-member for pressing against the bottom ofthe last, a spring, one end of which is secured to one of these members,and-easily releasable means for connecting the other end of the springwith the other of these members.

2. A. device for producing and maintaining friction between a last andan upper ably mounted member and its other end that is pulled over thesame, comprising a fixed to the outer end of the post, and 2h postadaptedto be suspended from the botstrap adapted to pass Over the uppersun 10 tom of the last a member slidebly mounted face of the upper andprovided at its ends 5 011 said post' and carrying a plurality of withmeans enge 'ing SELlCl hOOkSF hooks, a spring surrounding the post andIn testimony w'iereofl affix mysignature. having one of its endsconnected to the slid- MARIUS METHILTUS SORENSEN-

